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All results from a given calculation for C2H5CN (ethyl cyanide)

using model chemistry: CCSD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-171.766996
Energy at 298.15K 
HF Energy-171.020148
Nuclear repulsion energy102.705486
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CCSD(T)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3136 3057        
2 A' 3068 2991        
3 A' 3054 2977        
4 A' 2289 2231        
5 A' 1513 1475        
6 A' 1483 1446        
7 A' 1420 1385        
8 A' 1355 1320        
9 A' 1097 1070        
10 A' 1027 1001        
11 A' 840 818        
12 A' 532 519        
13 A' 205 200        
14 A" 3139 3060        
15 A" 3107 3029        
16 A" 1506 1468        
17 A" 1297 1264        
18 A" 1118 1090        
19 A" 787 767        
20 A" 376 367        
21 A" 227 221        

Unscaled Zero Point Vibrational Energy (zpe) 16288.3 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 15877.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/cc-pVTZ
ABC
0.92314 0.15646 0.14078

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.563 0.000
C2 0.000 0.822 0.000
C3 -0.771 -0.430 0.000
N4 -1.360 -1.433 0.000
H5 2.050 1.511 0.000
H6 1.805 -0.004 0.884
H7 1.805 -0.004 -0.884
H8 -0.294 1.399 0.879
H9 -0.294 1.399 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53362.48863.49641.09041.09021.09022.17522.1752
C21.53361.47082.63342.16212.17342.17341.09171.0917
C32.48861.47081.16283.42372.75642.75642.08492.0849
N43.49642.63341.16284.50433.58333.58333.15093.1509
H51.09042.16213.42374.50431.77081.77082.50542.5054
H61.09022.17342.75643.58331.77081.76732.52503.0795
H71.09022.17342.75643.58331.77081.76733.07952.5250
H82.17521.09172.08493.15092.50542.52503.07951.7583
H92.17521.09172.08493.15092.50543.07952.52501.7583

picture of ethyl cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.837 C1 C2 H8 110.777
C1 C2 H9 110.777 C2 C1 H5 109.818
C2 C1 H6 110.725 C2 C1 H7 110.725
C2 C3 N4 178.855 C3 C2 H8 107.995
C3 C2 H9 107.995 H5 C1 H6 108.603
H5 C1 H7 108.603 H6 C1 H7 108.305
H8 C2 H9 107.285
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability